HESTIA Logger

A high-performance, structured logging system for Python applications.
Supports async logging, Elastic Stack integration, structured JSON logs, and colorized console output.

Key Features

• Structured JSON & Human-Readable Logs (Optimized for Elastic Stack)
• Dynamic Metadata Support (user_id, request_id, etc.)
• Application-Aware Logging (get_logger("my_app"))
• Multi-Thread & Multi-Process Friendly (thread_id, process_id)
• Colored Console Output (INFO in green, ERROR in red, etc.)
• Internal Logger for Debugging the Logging System
• Supports File Rotation & Future Cloud Integration

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Documentation

The full documentation is available on GitHub Pages.

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Installation

pip install hestia-logger

Usage

1. Basic Setup

from hestia_logger import get_logger

# Get a logger instance
logger = get_logger("development")

# Log messages with different levels
logger.debug("This is a DEBUG log")
logger.info("Application started successfully")
logger.warning("Low disk space warning")
logger.error("Failed to connect to database")
logger.critical("System is down!")

2. Decorator Example

from hestia_logger import get_logger
from hestia_logger.decorators import log_execution

# Initialize the logger
logger = get_logger("decorator")

@log_execution
def add_numbers(a, b):
     """Adds two numbers and returns the result."""
     return a + b

@log_execution
def simulate_task():
     """Simulates a task that takes time."""
     import time
     time.sleep(2)
     return "Task completed!"

# Call the functions
if __name__ == "__main__":
     result = add_numbers(5, 10)
     logger.info(f"Result: {result}")

     task_status = simulate_task()
     logger.info(f"Task Status: {task_status}")

3. Adding Custom Metadata

from hestia_logger import get_logger

logger = get_logger("my_application", metadata={"user_id": "12345", 
                                                "request_id": "abcd-xyz"})

logger.info("User login successful")

Log File Structure

HESTIA Logger creates two main log files:

File	Format	Purpose
app.log	JSON	Machine-readable (Elastic Stack)
all.log	Text	Human-readable debug logs

Log Colors (Console Output)

Log Level	Color
DEBUG	🔵 Blue
INFO	⚫ Black
WARNING	🟡 Yellow
ERROR	🔴 Red
CRITICAL	🔥 Bold Red

Configuration

HESTIA Logger supports environment-based configuration via .env or export:

# Environment Variables
ENVIRONMENT=local
LOG_LEVEL=INFO

Example Log Output

Console (Colorized) + all.log (Text Format)

2025-03-06 20:40:23 - my_application - INFO - Application started!

app.log (JSON Format - Elastic Stack Ready)

{
    "timestamp": "2025-03-06T20:40:23.286Z",
    "level": "INFO",
    "hostname": "server-1",
    "container_id": "N/A",
    "application": "my_application",
    "event": "Application started successfully!",
    "thread": 12345,
    "process": 56789,
    "uuid": "d3f5b2c1-4f27-46a8-b3d2-f4a7a5c3ef29",
    "metadata": {
        "user_id": "12345",
        "request_id": "abcd-xyz"
    }
}

License

This project is licensed under the Apache 2.0 License - see the LICENSE file for details.